[USN-6017-1] Ghostscript vulnerability

[Rodrigo Figueiredo Zaiden]

==========================================================================
Ubuntu Security Notice USN-6017-1
April 13, 2023

ghostscript vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM

Summary:

Ghostscript could be made to crash or run programs as your login if it
received a specially crafted input.

Software Description:
- ghostscript: PostScript and PDF interpreter

Details:

Hadrien Perrineau discovered that Ghostscript incorrectly handled certain
inputs. An attacker could possibly use this issue to cause a denial of
service, or possibly execute arbitrary code.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.10:
   ghostscript                     9.56.1~dfsg1-0ubuntu3.1
   libgs9                          9.56.1~dfsg1-0ubuntu3.1

Ubuntu 22.04 LTS:
   ghostscript                     9.55.0~dfsg1-0ubuntu5.2
   libgs9                          9.55.0~dfsg1-0ubuntu5.2

Ubuntu 20.04 LTS:
   ghostscript                     9.50~dfsg-5ubuntu4.7
   libgs9                          9.50~dfsg-5ubuntu4.7

Ubuntu 18.04 LTS:
   ghostscript                     9.26~dfsg+0-0ubuntu0.18.04.18
   libgs9                          9.26~dfsg+0-0ubuntu0.18.04.18

Ubuntu 16.04 ESM:
   ghostscript                     9.26~dfsg+0-0ubuntu0.16.04.14+esm5
   libgs9                          9.26~dfsg+0-0ubuntu0.16.04.14+esm5

In general, a standard system update will make all the necessary changes.

References:
   https://ubuntu.com/security/notices/USN-6017-1
   CVE-2023-28879

Package Information:
   https://launchpad.net/ubuntu/+source/ghostscript/9.56.1~dfsg1-0ubuntu3.1
   https://launchpad.net/ubuntu/+source/ghostscript/9.55.0~dfsg1-0ubuntu5.2
   https://launchpad.net/ubuntu/+source/ghostscript/9.50~dfsg-5ubuntu4.7
 
https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.18.04.18
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